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® <br /> Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916) 921-9600 <br /> Analytical <br /> FAX equo 911s com <br /> . 1� www sequoialabs com <br /> Delta Environmental Consultants(Cameron Park) Project Arco 6100,Tracy,CA <br /> 3330 Cameron Park Dr Project Number N/A Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 02/27/01 18 01 <br /> Volatile Oxygenate Compounds by EPA Method 8260A <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Hatch Prepared Analyzed Method Notes <br /> VW-2(5102121-01)Water Sampled 02/08/01 07 13 Received 02/08/01 14 38 <br /> Tert-butyl alcohol 218 200 ug/l 1 1020161 02/20/01 02/20/01 EPA 9260A <br /> Methyl tert-butyl ether 395 200 A-Ola <br /> Di-isopropyl ether ND 200 " <br /> Ethyl tert-butyl ether ND 200 " <br /> Tert-amyl methyl ether _ ND 200 <br /> Surrogate 12-DCA44 91 6% 60-140 " <br /> VW-3(S102121-02)Water Sampled 02/08/01 07 20 Received 02/08/01 14 38 <br /> Tert-butyl alcohol 387 200 ug/l 1 1020161 02/20/01 02/20/01 EPA 8260A A-01a <br /> Di-isopropyl ether ND 200 " <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-amyl methyl ether 570 200 •• <br /> Surrogate 12-DCA44 898% 60-140 <br /> *3(5102121-02RE1)Water Sampled 02/08/01 07 20 Received 02/08/01 14 38 <br /> Methyl tert-butyl ether 1000 200 ug/1 10 1020207 02/21/01 02/21/01 EPA 8260A <br /> Surrogate 12-DCA-d4 892% 60-140 " <br /> VW-4(5102121-03)Water Sampled 02/08/01 07 37 Received 02/08/01 14 38 <br /> Tert-butyl alcohol ND 20000 ug/] 100 1020161 02/20/01 02/20/01 EPA 8260A R-01 <br /> Methyl tert-butyl ether 1890 200 " R-01 <br /> Di-isopropyl ether ND 200 " " " " " R-01 <br /> Ethyl tert-butyl ether ND 200 R-01 <br /> Tert-amyl methyl ether ND 200 " R-01 <br /> Surrogate 1 2-DCII-d4 896% 60-140 <br /> ola Analytical- Sacramento The results rn this repo-,appLy•o the samples analyzed,n acco+dance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4 of 13 <br />